The effect of muscular fatigue on temporal and spectral features of muscle activities and motor performance, i.e., kinematics and kinetics, has been studied. It is of value to quantify fatigue related kinematic changes in biomechanics and sport sciences using simple measurements of joint angles. In this work, a new approach was introduced to extract kinematic changes from 2D phase portraits to study the fatigue adaptation patterns of subjects performing elbow repetitive movement. This new methodology was used to test the effect of load and repetition rate on the temporal changes of an elbow phase portrait during a dynamic iso-inertial fatiguing task. The local flow variation concept, which quantifies the trajectory shifts in the state space, was used to track the kinematic changes of an elbow repetitive fatiguing task in four conditions (two loads and two repetition rates). Temporal kinematic changes due to muscular fatigue were measured as regional curves for various regions of the phase portrait and were also expressed as a single curve to describe the total drift behavior of trajectories due to fatigue. Finally, the effect of load and repetition rate on the complexity of kinematic changes, measured by permutation entropy, was tested using analysis of variance with repeated measure design. Statistical analysis showed that kinematic changes fluctuated more (showed more complexity) under higher loads , but did not differ under high and low repetition rates . Using the proposed method, new features for complexity of kinematic changes could be obtained from phase portraits. The local changes of trajectories in epochs of time reflected the temporal kinematic changes in various regions of the phase portrait, which can be used for qualitative and quantitative assessment of fatigue adaptation of subjects and evaluation of the influence of task conditions (e.g., load and repetition rate) on kinematic changes.
Skip Nav Destination
e-mail: sanjarima@alum.sharif.edu
e-mail: arshi@aut.ac.ir
e-mail: parnianpour@sharif.edu
e-mail: seyedmohseni@iums.ac.ir
Article navigation
October 2010
Research Papers
Local State Space Temporal Fluctuations: A Methodology to Reveal Changes During a Fatiguing Repetitive Task
Mohammad Ali Sanjari,
Mohammad Ali Sanjari
Department of Biomedical Engineering,
e-mail: sanjarima@alum.sharif.edu
Amirkabir University of Technology
, 15875–4413, Tehran, Iran
Search for other works by this author on:
Ahmad Reza Arshi,
Ahmad Reza Arshi
Department of Biomedical Engineering,
e-mail: arshi@aut.ac.ir
Amirkabir University of Technology
, 15875–4413, Tehran, Iran
Search for other works by this author on:
Mohamad Parnianpour,
Mohamad Parnianpour
Department of Mechanical Engineering,
e-mail: parnianpour@sharif.edu
Sharif University of Technology
, 11155–9567, Tehran, Iran; Department of Industrial and Management Engineering, Hanyang University
, Ansan Gyeonggi-do, 426–791, Republic of Korea
Search for other works by this author on:
Saeedeh Seyed-Mohseni
Saeedeh Seyed-Mohseni
Biomechanics Laboratory, Rehabilitation Research Center, Faculty of Rehabilitation,
e-mail: seyedmohseni@iums.ac.ir
Iran University of Medical Sciences
, 15459–13487, Tehran, Iran
Search for other works by this author on:
Mohammad Ali Sanjari
Department of Biomedical Engineering,
Amirkabir University of Technology
, 15875–4413, Tehran, Irane-mail: sanjarima@alum.sharif.edu
Ahmad Reza Arshi
Department of Biomedical Engineering,
Amirkabir University of Technology
, 15875–4413, Tehran, Irane-mail: arshi@aut.ac.ir
Mohamad Parnianpour
Department of Mechanical Engineering,
Sharif University of Technology
, 11155–9567, Tehran, Iran; Department of Industrial and Management Engineering, Hanyang University
, Ansan Gyeonggi-do, 426–791, Republic of Koreae-mail: parnianpour@sharif.edu
Saeedeh Seyed-Mohseni
Biomechanics Laboratory, Rehabilitation Research Center, Faculty of Rehabilitation,
Iran University of Medical Sciences
, 15459–13487, Tehran, Irane-mail: seyedmohseni@iums.ac.ir
J Biomech Eng. Oct 2010, 132(10): 101002 (9 pages)
Published Online: September 27, 2010
Article history
Received:
January 9, 2010
Revised:
August 9, 2010
Posted:
August 16, 2010
Published:
September 27, 2010
Online:
September 27, 2010
Citation
Sanjari, M. A., Arshi, A. R., Parnianpour, M., and Seyed-Mohseni, S. (September 27, 2010). "Local State Space Temporal Fluctuations: A Methodology to Reveal Changes During a Fatiguing Repetitive Task." ASME. J Biomech Eng. October 2010; 132(10): 101002. https://doi.org/10.1115/1.4002373
Download citation file:
Get Email Alerts
Cited By
Related Articles
Design, Build, and Test of a Bobsled Simulator for Olympic Athletes
J. Med. Devices (March,2007)
An EMG-Driven Biomechanical Model That Accounts for the Decrease in Moment Generation Capacity During a Dynamic Fatigued Condition
J Biomech Eng (July,2010)
Related Proceedings Papers
Related Chapters
Investigation and Analysis on the College Extracurricular Sport Activities in Shanxi Province
International Conference on Computer Technology and Development, 3rd (ICCTD 2011)
Talking on the Thoughts of How to Keep in Good Health of the Confucianism, Taoism and the Buddhism
International Conference on Computer Technology and Development, 3rd (ICCTD 2011)
Shallow Exploration on Modern Sports Leisure Park Landscape Design On the Landscape Design of Honglian Lake Water Sports Training and Completion Base
International Conference on Optimization Design (ICOD 2010)